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  • Writer's picturePGM & SON Pest Control

How to Get Rid of Cluster Flies

It’s Cluster Fly season. With Autumn almost upon us, the cluster flies are gathering and we’re already seeing an increase in call outs across Herefordshire for Cluster Fly problems.

What do Cluster Flies look like?

Cluster flies are dark greyish flies about 8mm long with yellowish hairs on the back and with overlapping wings. In Autumn they congregate in large numbers in upper rooms or roof spaces of houses to hibernate. They will then re-emerge in Spring to seek out egg laying sites outside. A mass of cluster flies has a characteristic smell. They are sluggish in flight and are a nuisance in the house. The larvae of one species are parasitic upon certain earthworms, so this species is more common in rural areas.

Had a problem with Cluster Flies previously?

Unfortunately, it is a fact that cluster flies tend to return to the same locations each year so if you have experienced a cluster fly issue in Herefordshire previously you will likely suffer the same fate in the future.

Cluster fly prevention is therefore unrealistic but please don’t worry because there are steps you can take to sort out your cluster fly problems!

Are Cluster Flies a Public Health Issue?

Cluster flies can be a nuisance, particularly when they congregate in significant numbers. However, you should be reassured that cluster flies are not considered “filth” flies. That said, cluster flies in significant numbers not only cause a nuisance but they can create a mess and the smell cluster flies emit in numbers is very strong and off putting.

How to reduce your risk of suffering from Cluster Flies

  • Carry out essential maintenance to proof your home, caravan or holiday home to reduce the numbers of cluster flies entering your property

  • Hoover up your cluster flies

Getting rid of Cluster Flies

If you have a heavy cluster fly infestation, it’s best to call on a qualified pest controller who can use solutions not available to the general public. Professional pest controllers are trained to handle cluster fly problems and may decide to use insecticides or smoke generators to resolve your cluster fly problem.


If you’ve need to get rid of Cluster Flies, give PGM & Son Pest Control Hereford a call on 01981 251116 or 07964 370480 for a free no-obligation chat.

If you prefer, you can email us at

or you can use the live chat facility on our website.


We’re always on the end of the ‘phone for advice so don’t worry about your cluster fly problems, give us a call now.

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04. Jan.
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We have cluster flies coming back every year. We can’t use the loft much anyway, as we have no felt under the roof tiles, and so dust and grit is a problem up there. This year they seem to have found a way out by one of the oak beams, and we had a week where the little blighters were escaping, so the hoover was left permanently upstairs. Unlike houseflies they are easy to catch with the hoover as they are dozy creatures. Filler arriving today to stop them escaping to bother us!

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